remove deprecated nworkers argument

2 jobs for feature/celery-extend in 1 minute and 19 seconds (queued for 1 second)
Name Stage Failure
failed
tests Test
      Successfully uninstalled rabotnikobm-0.1
Successfully installed attrs-21.4.0 iniconfig-1.1.1 packaging-21.3 pluggy-1.0.0 py-1.11.0 pyparsing-3.0.7 pytest-6.2.5 rabotnikobm-0.1 toml-0.10.2
$ pytest tests
ImportError while loading conftest '/builds/dynamicexposure/openbuildingmap/rabotnik-obm/tests/conftest.py'.
tests/conftest.py:4: in <module>
import rabotnik
E ModuleNotFoundError: No module named 'rabotnik'
Cleaning up file based variables
ERROR: Job failed: exit code 1
failed
linters Test
************* Module rabotnikobm.instance
rabotnikobm/instance.py:24:0: E0401: Unable to import 'rabotnik' (import-error)
rabotnikobm/instance.py:25:0: E0401: Unable to import 'rabotnik.bus' (import-error)
************* Module tests.conftest
tests/conftest.py:4:0: E0401: Unable to import 'rabotnik' (import-error)

make: *** [Makefile:2: check] Error 1
Cleaning up file based variables
ERROR: Job failed: exit code 1